Q:

A) 54 % | B) 64 % |

C) 74 % | D) 84 % |

Answer: B) 64 %

Explanation:

Explanation:

Let the number be x.

Then, ideally he should have multiplied by x by 5/3. Hence Correct result was x * (5/3)= 5x/3.

By mistake he multiplied x by 3/5 . Hence the result with error = 3x/5

Then, error = (5x/3 - 3x/5) = 16x/15

Error % = (error/True vaue) * 100 = [(16/15) * x/(5/3) * x] * 100 = 64 %

5
312

Q:

A) 5 : 6 | B) 8 : 9 |

C) 3 : 4 | D) 4 : 5 |

3
265

2
278

Q:

A) ₹ 11,500 | B) ₹ 11,400 |

C) ₹ 11,000 | D) ₹ 11,600 |

1
1713

7
466

Q:

A) increase by 2.8% | B) decrease by 1.8% |

C) increase by 1.8% | D) decrease quadrilateral by in 2.8% |

0
384

2
392

Q:

A) 1623°° | B) 20°° |

C) 80°° | D) 8313°° |

3
320